Description of the error code "ErrorMailboxNotFound"

Domain: Exchange

Code: ErrorMailboxNotFound

Type: Configuration error (You are often able to resolve this type of error.)

Description: The mailbox does not exist. The mailbox address is wrong, or we do not have access to the mailbox.

Possible solution: Check that the mailbox address is correct.
Alternatively, check that the connecting Exchange user is allowed to access the mailbox.